--- autoconf-2.69/man/Makefile.am	2022-12-27 15:22:52.186142107 +0800
+++ autoconf-2.69/man/Makefile.am.orig	2012-01-21 21:46:39.000000000 +0800
@@ -58,7 +58,8 @@
 	    --include=$*.x \
 	    --include=$(srcdir)/common.x \
 	    --source='$(PACKAGE_STRING)' \
-	    --output=$@.t `echo '$*' | sed 's,.*/,,'`
+	    --output=$@.t \
+	    --no-discard-stderr `echo '$*' | sed 's,.*/,,'`
 	if sed $(remove_time_stamp) $@ >$@a.t 2>/dev/null && \
 	   sed $(remove_time_stamp) $@.t | cmp $@a.t - >/dev/null 2>&1; then \
 		touch $@; \
--- autoconf-2.69/man/Makefile.in	2022-12-27 15:23:19.743692892 +0800
+++ autoconf-2.69/man/Makefile.in.orig	2012-04-25 10:40:26.000000000 +0800
@@ -464,7 +464,8 @@
 	    --include=$*.x \
 	    --include=$(srcdir)/common.x \
 	    --source='$(PACKAGE_STRING)' \
-	    --output=$@.t `echo '$*' | sed 's,.*/,,'`
+	    --output=$@.t \
+	    --no-discard-stderr `echo '$*' | sed 's,.*/,,'`
 	if sed $(remove_time_stamp) $@ >$@a.t 2>/dev/null && \
 	   sed $(remove_time_stamp) $@.t | cmp $@a.t - >/dev/null 2>&1; then \
 		touch $@; \